JMMCE  Vol.2 No.5 , September 2014
Recovery of Iron Values from Waste Manganiferous Iron Ore Fines for Pellet Making
A large volume of overburden and mine wastes is generated during the extraction and beneficiation of the low grade ores. The waste low grade manganiferous iron ore fine from southern part of India was studied for recovery of iron values. The chemical assay of the sample is 52.36% Fe, 4.75% Mn, 8.5% SiO2 and 2.82% Al2O3. The characterization study of the sample indicates the presence of microplaty hematite, goethite, pyrolusite, cryptomelane with minor amount of quartz and kaolinite. The beneficiation study of the sample does not respond to the conventional route of desliming the ground feed followed by gravity separation and magnetic separation. Therefore, an alternative technique of reduction roasting using a producer gas was attempted at different conditions. The characterization of roasted product reveals the phase transformation to magnetite and microplaty magnetite. The low intensity magnetic separation conducted with the roasted products generated at optimal condition shows that 70% concentrate having 64.5% Fe and 1.87% Mn could be produced. The high manganese in the concentrate works as an additive for making pellet with enhancement in pellet strength and drop in reducibility. Utilization of mines waste has significant impact on mineral resources and environmental hazard.

Cite this paper
Dey, S. , Mohanta, M. , Goswami, M. and Pani, S. (2014) Recovery of Iron Values from Waste Manganiferous Iron Ore Fines for Pellet Making. Journal of Minerals and Materials Characterization and Engineering, 2, 513-521. doi: 10.4236/jmmce.2014.25052.
[1]   Pradip, P. (2006) Processing of Alumina-Rich Indian Iron Ore Slimes. International Journal of Minerals, Metals and Materials Engineering, 59, 551-555.

[2]   Collins, R.J. and Ciesielski, S.K. (1994) Recycling and Use of Waste Materials and By-Products in Highway Construction National Cooperative Highway Research Program Synthesis of Highway Practice 199. Transportation Research Board, Washington DC.

[3]   U.S. Environmental Protection Agency (1985) Report to Congress on Wastes from the Extraction and Beneficiation of Metallic Ores, Phosphate Rock, Asbestos, Overburden from Uranium Mining, and Oil Shale. Report No. EPA/530- SW-85-033, Washington, DC.

[4]   Mine Waste Management Report (2009)

[5]   Mishra, B.K., Reddy, P.S.R., Das, B., Biswal, S. and, Prakash, S. (2007) Issues Relating to Characterization and Beneficiation of Low Grade Iron Ore Fines. Steelworld, Mumbai, 34.

[6]   Pani, S., Dey, S., Mohanta, M.K. and Singh, R. (2010) An Approach for Recovery of Iron Values from Slimes. Proceedings of the XI International Seminar on Mineral Processing Technology (MPT-2010). Jamshedpur, December 2010, 612-620.

[7]   Dey, S., Pani, S., Mohanta, M.K. and Singh, R. (2012) Utilization of Iron Ore Slimes: A Future Prospective. Separation Science and Technology, 47, 769-776.

[8]   Schluter, R.B. (1974) Influence of Manganese Additions upon Properties of Iron Ore Pellets. Bureau of Mines Report of Investigations, RI 7870.

[9]   Minerals Year Book (Part III Minerals Review) (2012) 5th Edition, Indian Bureau of Mines, Nagpur, Chapter 28, Page 2.

[10]   Federation of Indian Mineral Industry (FIMI) Report (2008) Creating a Vibrant Iron Ore Industry in India—A Survey. 1-2.

[11]   Connor, F.O., Cheung, W.H. and Valix, M. (2006) Reduction Roasting of Limonite Ores: Effect of Dehydroxylation. International Journal of Mineral Processing, 80, 88-99.

[12]   Bleifuss, R.L. and Tufford, G.L. (1968) The System Fe-Mn-SiO2-O2 and Its Application to the Beneficiation of Manganiferous Iron Ores by Reduction Roasting. Society of Mining Engineers, 204-221.

[13]   Fuller, H.C. (1994) Decomposition of Manganese Sulfate by a Partial Reduction Process. United States Bureau of Mines Reports, RI-6794.

[14]   Bogdandy, L.I. and Engll, H.J. (1971) The Reduction of Iron Ores. Scientific Basis and Technology, 16-17.